Acoustic Properties of Biodegradable Nonwovens

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dc.contributor.advisor Nancy Powell, Committee Co-Chair en_US
dc.contributor.advisor Pamela Banks-Lee, Committee Co-Chair en_US
dc.contributor.advisor Nancy Cassill, Committee Member en_US
dc.contributor.advisor Stephen Michielsen, Committee Member en_US Yilmaz, Nazire Deniz en_US 2010-04-02T18:28:21Z 2010-04-02T18:28:21Z 2009-12-07 en_US
dc.identifier.other etd-10192009-174257 en_US
dc.description.abstract ABSTRACT YILMAZ, NAZIRE DENIZ. Acoustical Properties of Biodegradable Nonwovens.(Under the direction of Nancy Powell and Pamela Banks-Lee.) The purpose of this study is to provide a better understanding of acoustical properties of nonwovens, and to model the noise control behavior in terms of material and treatment parameters. A review of existing models on sound absorption of fibrous materials, coupled with experimental data will help in modeling sound absorption in multi-layer needle-punched nonwovens fabrics of different fibers: hemp, polylactide, polypropylene, and glassfiber. The effects of several treatments, which the materials may undergo during sound absorber manufacturing, namely alkalization, compression and heat treatments are investigated. The collected data is evaluated by experts. Expert evaluation further provides information about the market demands about sound absorbers, and the perception of the designed nonwovens through the eyes of professionals. This research provides a contribution to the body of knowledge on the sound absorption properties of nonwovens, provides a better understanding of the effects of some manufacturing processes on nonwovens’ noise control performance and contributes to the wider adoption of nonwovens as sound absorbers. en_US
dc.rights I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dis sertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. en_US
dc.subject sound absorption en_US
dc.subject acoustic en_US
dc.subject nonwoven en_US
dc.title Acoustic Properties of Biodegradable Nonwovens en_US PhD en_US dissertation en_US Textiles en_US

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